Lock.



A. C. 0.`BOCK.

LOCK.

APPLICATION FILED FEB. 26. 19l5.`

LNKOL Patented Mar. 28, 1916.

sa; ron.

ALFRED C. 0. BUCK, OF NEW YORK, N. Y., ASSIGNOR, :BAY MESNE ASSIGNMENTS, TO BURGLAR PROOF LOCK AND HARDWARE CORPORATION, OF NEW YORK, N. Y., A

CORPORATION OF NEW YORK.

LOCK.

Specification of Letters Patent.

Patented Mar. 28, 1916.

Application :iledlebruary 26, 1915. Serial No. 10,683.

resident of the city `or New York, in the county of' Kings and State of New York, have invented certain new and useful Improvements in Locks, of which the following is a specification.

This invention relates to locks, ticularly and parhouse-door and is secured upon the'interior side of such door where 1t serves as a night lock or night latch. Such locks are suscepl tible to being picked or dislocated by a burglarreaching thereto with a jimmy through the exterior of the door.

The'principal object of my invention is to provide a simple, inexpensive, eilicient, and improved lock of this type that will prevent, by jimmying through the exterior of the door, any attempt to reach its lockbolt in order to shift it aside and any attempted lateral dislocation of the lock or its keeper,` whereby breaking in through the door' will be frustrated. I

Other objects and advantages will hereinafter appear.

In the accompanying drawings,-Figure 1 isa top View of the lock, showing it as it appears when looked upon downwardly in its mounted position on the door. Fig. 2 is a front elevation of the lock shown in Fig. 1. Fig. 3 is a front elevation of the keeper. Fig. 4 is a side elevation of the keeper. Fig. 5 is a side elevation of ithe lock. Fig.

6 is a fragmentary View showing the end of the lock-casing.

A cast-metal casing 1 containing the lock mechanism and constituting the lock body proper is secured, by means of s crews in openings 3, against the inner slde of a swinging door 2 which opens into the interior of a room in the direction of the arrow, Fig. 1, and a keeper 4 for the latch or bolt 5 of the lock is secured to the door frame 6 by screws 7 in openings 8 of the keeper. When securingthe casingl to the door 2 it is alined in proper posltlon near the edge 9 of the door by means of a ledge 10 projecting from the casing being fitted into a recess 11 cut into the edge of the door. The tumbler-barrel 12 of the lock passes through the door 2 whereby a key may be insertedfrom the exterior to unto that type of lock which is ordinarily used in connection Awith an outside lock the door, while at the inner side of 'the door it may be unlocked by turning a knurled knob 13 connected to said barrel. Upon closing the door 2l the cammed or beveled side 14 of the spring-pressed latch 5 strikes the rim 15 of the staple-portion 16 forming part of the keeper 4, whereby the latch 1s caused to first move into the casing 1 and then automaticallyenter said staple port1on and securely lock the door. The latch5. may thereafter be moved out oi the staple portion 16 for unlocking the door by means of the key or turning of the knob 13,

and when desired the latch maybe set to be maintained within the casing 1 in inoperative position by turning the knob 13 and incidentally shifting the detent 17. All of the above mentioned lock movements are common in the ordinary Yale or other makes of locks that are adaptable to be secured upon the interior sides of house doors and used as night locks or night latches.

The keeper 4, preferably made of cast metal, is provided with: an angle portion 18 comprising legs 19, 20 which are fitted against the door frame 6, and firmly se- 'cured thereto by the screws 7, with the staple portion 16 alined in proper relation to the bolt 5 of lock 1. When the keeper 4 is properly fitted in position its leg 19 rests against the inner side of the door-frame and the leg 20 thereof is fitted into a recess 21 formed in the edge 22 of said frame, whereby the outer surface of this leg is flush with the door-edge `22 and a portion of said surface near the corner 23 of the angle 18 fits against the ledge 1.0 of the lock casing. At the rear side of the lock casing 1 the casing-wall, which is adjacent the door 2 and indicated by the shaded portion 24, extends considerably beyond the dooredge 9, and preferably the remaining sides of the casing likewise extend beyond the door. 1n the extended portion 24 near its end 25, Fig. 6, is provided'a narrow elongated groove 26 which is parallel to thc end 25, and at each extremity of said groove is formed a recess 27 in the casing 1, which recesses are considerably deeper than thc groove 26. Each extremity 28 of the end 25 is undercut, whereby with relation to these undercut portions and its adjacent parallel groove 2G the said end constitutes an elongated vprojection the top of which lies in the plane of the rear side of the casing-portion 24. 1n

the leg 19 of the keeper A is formed an elongated slot 29 which is parallel and close to the leg 2O and adaptable to iittlngly re ceive the projection :25, and near each extremity of said slot is formed a lug 30 which is a continuation of the leg 20, the said lugs being adapted to fit into the recesses 27 of the lock casing.l Upon closing the swinging door Q and the bolt 5 entering its staple 16 to maintain the door locked, the casingeportion 24: extends over the door frame 6 and overlaps the leg 19 of keeper Li, and in this position the projection 25 of extended casing portion 241 enters the slot 29 in keeper 4 while the bottom part 31 of leg 2G and the lugs 30 of the keeper enter the groove 26 and the recesses 27 of the lock-casing respectively.

Should any attempt be made to pick the lock by shifting its latch 5 out of its staple 1G with a jimmy inserted through the woodwork of the door from the exterior it would be frustrated by the complete interlocking of the casing-portion 24 with the keeper legs 19,- 20, which interlocking parts consti tute a solid, continuous, and strong metal wall between the latch and the woodwork and thereby completely protect the latch. And should any attempt be made with a jimmy to force away the keeper or lock sidewise, the projections 25, 31, and the lugs 30, which extend transversely to the direction of movement of the bolt 5, would prevent any lateral dislocation of the keeper and lock or a part thereof. The disposition of the` lugs 30 at the extreme ends of the lock casing 1 will prevent any attempted up and down dislocation of the lock. lt

j will be evident that by means of this lock construction any other means of picking or dislocation of the lock by jirnmying from the exterior will be prevented and bnrglarizing or breaking in frustrated Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, 1-

claim 1. A lock for the interior side of a house swinging door having the combination of a look casing, said casing having its portion which is adjacent to and in contact with the door extend beyond the door and upon the door frame, said portion having a Liv/noel projection extending transversely to the direction of movement of the lockbolt, said portion having a groove at one side of said projection, said portion having a recess at each side of said groove, a keeper having an opening `for receiving said projection,

a portion of said keeper entering said groove, and. said keeper having lugs extending movement of the bolt adaptable to enter said recesses.

2. A lock for the interior side of a house swinging-door having the combination of a lock casing, said casing having its portion which is adjacent to and in contact with the door extend beyond the door and upon the door frame, said portion having a projection extending transversely to the direction of movement of the lock bolt, said portion having a recess at each side of said projection, a keeper having an opening for receiving said projection, and said keeper having lugs extending transversely to the direction of movement of the bolt adaptable to enter said recesses.

3. A lock for the interior side of a house .swinging-door having the combination of a lock casing, saidcasing having its portion Iadjacent the door extend beyond the door and upon the door frame, said portion having a groove, said portion having a recess at each side of said groove, a keeper having a portion thereof entering said groove, and said keeperhaving lugs extending transversely to the direction of movement of the lock bolt adaptable to enter said recesses.

4. A lock for the interior side of aliouse swinging-door having the combination of a lock casing, Said casing having its portion which is adjacent to and in contact with the door extend beyond the door and upon the door frame, ysaid portion having a recess at eachside thereof, and a keeper having lugs extending transversely to the direction of movement of the lock bolt adaptable to' enter said recesses. 4

Signed at the city of Jew York, in the countyl of New York, and State ot New York, this @3rd day of February, A. D. 1915.

ALFRED C. O. BOOK.

Witnesses:

N. C. DONATO, B. Roi/KAN.

transversely to the direction of 

